Sound issues with Ubuntu Mate 20.04 on Asus laptop

I'm a very new linux Ubuntu user (coming from variety of Win and Mac's).

I bought a new Asus laptop (Q537D), preinstalled with windows 10. I decided to install first Linux Mint, then switched to Ubuntu Mate 20.04.

Problem I am having is I can not get audio to play through system speakers. using PAVU, I see signal when sound is playing, but it does not come through speakers. I have conencted a pair of jLab JBuds Air (bluetooth ear buds) and they WORK. However, I have to use them in a mode which does not recognize the mic. Just would like to work with someone to suss out some of these issues. I have searched this forum and others for the past week, trying all recommendations but nothing seems to work.

Thanks.